So... It is said that ORT is indestructible on Earth because it is not governed by the Gaian system. The concept of Earthly death does not bind this mollusk. With that said, let's say we put a person on the moon, since it is not a Type-Moon, the Lunar death system does not apply to this person? Earthlings are immortal on the moon?

Haha, how can nasuverse not contain contradictions? It's the most bullshitty system I've ever seen

The instant I tear off your limbs, rip open your chest and pull out your intestines, biting into your neck as you ask for mercy, chewing through your eyes and spreading your brains on the ground like butter-------!

zweiterversuch wrote:Anyway... if we take all this in consideration could Arc, being CM reeincarnation, be called a Type-something?

The only thing that comes to mind with her is Type-Arc, or maybe even Type-Neco-Arc. The reason for this is because sometimes a cat is fine too with her of course. Besides there is a posibility that she is a Type-Moon setup since her powers usually come from the moon itself, so there's another posiblitiy there.

What I was trying to convey was that, humans are creatures of the Earth, which follow the Gaian system of death. Once a person gets chucked to the moon, he would be incompatible with the Lunar system, thus should not be able to die a "Lunar death".
zweiterversuch brought up a good point, since Types were slain in Notes, so they must be able to die on Earth. However, I think they were slain by Knight Arms and aether weapons, which might not strictly follow the Gaian system (like slash emperor actually errodes the Earth). This can mean that they indeed didn't die of Earthly means...

Sheesh! Nasuverse it's so full of holes that, if it was a ship, I'd very much rather swim... and I can't swim!
I know nothing of the Slash-Emperor, but the Types are a great example, and considering only Type-Moon (Crimson Moon), Shiki shouldn't be able to kill Arcueid, and he does in Tsukihime, and twice if it's Ciel's Route (well, almost kills her). I'm pretty sure that the "death concept" or whatever that depends on each Type is just something that he recently added but screwes with a lot of stuff he put in it earlier, else... well, he better start keeping track of whatever he writes.

"I settled for that shriek. Those dull vacant eyes... oiled cabbage stench of her...! [...] You know what? I'm sorry if I'm not gonna do this the way you want me to or the way you might. But I will not make an angel out of someone who wasn't an angel...!" -Chief Tyrol, on his beloved wife.Have you heard about the saying that goes something like "drunk people and kids tell no lies"? Well, that's just a fallacy.

Well, from what I've seen, Type-Mercury is 'merely' immune to being dot-stabbed by one of the Shikis - if you want to try and take out ORT, you'd have to do it the hard way.

Although, not much short of the Black Barrel itself would be enough to bring down one of the Aristotles - though as Zel proved, having control of the Second Magic can help in driving one off.

In the case of Arc, she - and other True Ancestors - are more like avatars of CM, but made on Earth in the context of the Gaian system. CM himself originally came to Earth from Luna and been somewhat different - in a not-entirely-dissimilar way that ORT did, or that the other Aristotles may do if humanity proceeds to drive the Earth's biosphere far enough into the ground to provike the events of Notes.

Maybe a reason why no True Ancestor can quite match the conditions of the original form of Crimson Moon is precisely because they are Earth-made beings, as opposed to being sent to Earth from Luna directly?

I get the impression that there's something different about CM that makes it stand aside from your average Aristotles - perhaps there is some sort of inherent bond between the Earth and Moon (the latter was most likely formed from debris blasted off the still-forming Earth by a collision with a Mars-sized protoplanet) that made it easier for CM to interact with Gaia in the manner which led to the creation of the True Ancestors, yet keeps ORT from establishing (so far as we know) further communication with Terran entities?

And no humans would probably die. The reason types ORT can't die from Meodp is because he doesn't have a predetermined death, which is the basis for Shiki's eyes. They can be physically destroyed though. Just ask Zel